Quantitative determination of fluorinated alkyl substances by large-volume-injection liquid chromatography tandem mass spectrometry - Characterization of municipal wastewaters
Quantitative determination of fluorinated alkyl substances by large-volume-injection liquid chromatography tandem mass spectrometry - Characterization of municipal wastewaters
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DOI：
10.1021/es051381p
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发表时间：
2006-01-01
影响因子：
11.4
通讯作者：
Field, JA
中科院分区：
文献类型：
--
作者：
Schultz, MM;Barofsky, DF;Field, JA
建立了城市污水进出水中氟代烷基化合物的定量分析方法。该方法包括离心，然后通过大体积注射（500 μ L）的上清液到液相色谱仪与反相柱和电喷雾电离和串联质谱检测。研究的氟化分析物包括全氟烷基磺酸盐、氟调聚物磺酸盐、全氟羧酸盐和选择的氟化烷基磺酰胺。回收率的含氟分析物从污水处理厂（WWTP）的原料流入物和最终流出物的范围分别为82-100%和86- 100%。根据分析物，定量下限为0.5 ng/L。该方法被施加到流量比例的合成物的原进水和最终出水收集在24小时内从全国10个污水处理厂。在所有处理厂的废水中均观察到氟化烷基物质，尽管处理工艺相似，但每个处理厂都显示出氟化烷基物质的独特分布。在10个抽样工厂中的9个工厂中，与流入物浓度相比，至少有一类含氟烷基物质在流出物中的浓度增加。在某些情况下，观察到某些氟化分析物浓度的降低，并归因于污泥的吸附。
A quantitative method was developed for the determination of fluorinated alkyl substances in municipal wastewater influents and effluents. The method consisted of centrifugation followed by large-volume injection (500 mu L) of the supernatant onto a liquid chromatograph with a reverse-phase column and detection by electrospray ionization and tandem mass spectrometry. The fluorinated analytes studied include perfluoroalkyl sulfonates, fluorotelomer sulfonates, perfluorocarboxylates, and select fluorinated alkyl sulfonamides. Recoveries of the fluorinated analytes from wastewater treatment plant (WWTP) raw influents and final effluent were in the ranges of 82-100% and 86-100%, respectively. The lower limit of quantitation was 0.5 ng/L depending on the analyte. The method was applied to flow-proportional composites of raw influent and final effluent collected over a 24 h period from 10 WWTPs nationwide. Fluorinated alkyl substances were observed in wastewater at all treatment plants, and each plant exhibited unique distributions of fluorinated alkyl substances despite similarities in treatment processes. In 9 out of the 10 plants sampled, at least one class of fluorinated alkyl substances exhibited increased concentrations in the effluent as compared to the influent concentrations. In some instances, decreases in certain fluorinated analyte concentrations were observed and attributed to sorption to sludge.